Warner Service
HVAC contractor in Frederick, MD 21701
About this company
Warner Service is listed as an HVAC contractor at 217 Monroe Ave in Frederick, Maryland, in Frederick County. It is one of 13 HVAC companies in ZIP 21701.
Other HVAC companies nearby
Frederick Air, Inc.3 King Ave, Frederick
0.4 mi(301) 783-1992
Holtzople Heating & Air Conditioning47 S Carroll St, Frederick
0.9 mi(866) 500-4328
Brick Street Plumbing & HVAC47 E All Saints St, Frederick
1.0 mi(301) 969-4911
Wyant Heating & Air1573 Tilco Dr, Frederick
1.0 mi(301) 620-1770
American Air, LLC8403 Eagles Nest Rd, Frederick
1.1 mi(301) 676-9234
Housing market around ZIP 21701
Figures describe the local area, not this company.
Typical home value$443,000−1.0% past year · +57% in 10 years
Typical rent$2,158+3.3% past year
12-month value outlook+0.2%Roughly flat
New homes permitted, 20251,168Frederick County
Days to sale agreement19Washington metro · 17 a year ago
Listings with a price cut29.4%Washington metro
Sale price vs list99.7%Washington metro
New construction sales489Washington metro, Aug · −24% from last year
Source: Zillow (home values, rent, outlook and metro sales), data through Sep 2026. Permits: U.S. Census Bureau.
Typical home value, last 10 years
Source: Zillow Home Value Index, Sep 2026.
Local building angle: Frederick County permitted 1,168 new homes in 2025, including 354 apartment units. 25% of the homes in this ZIP were built since 2000.
Local figures are estimates from public records and Zillow housing data, updated regularly.